US5846008A - Sheet alignment device for use in a printing apparatus - Google Patents
Sheet alignment device for use in a printing apparatus Download PDFInfo
- Publication number
- US5846008A US5846008A US08/756,309 US75630996A US5846008A US 5846008 A US5846008 A US 5846008A US 75630996 A US75630996 A US 75630996A US 5846008 A US5846008 A US 5846008A
- Authority
- US
- United States
- Prior art keywords
- sheet
- pick
- pivot
- roller
- driving gear
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 230000008878 coupling Effects 0.000 claims 1
- 238000010168 coupling process Methods 0.000 claims 1
- 238000005859 coupling reaction Methods 0.000 claims 1
- 230000033001 locomotion Effects 0.000 abstract description 17
- 238000012840 feeding operation Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 3
- 230000000717 retained effect Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000002708 enhancing effect Effects 0.000 description 2
- 238000007792 addition Methods 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H3/00—Separating articles from piles
- B65H3/02—Separating articles from piles using friction forces between articles and separator
- B65H3/06—Rollers or like rotary separators
- B65H3/0669—Driving devices therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H3/00—Separating articles from piles
- B65H3/02—Separating articles from piles using friction forces between articles and separator
- B65H3/06—Rollers or like rotary separators
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
- B41J11/00—Devices or arrangements of selective printing mechanisms, e.g. ink-jet printers or thermal printers, for supporting or handling copy material in sheet or web form
- B41J11/0045—Guides for printing material
- B41J11/0055—Lateral guides, e.g. guides for preventing skewed conveyance of printing material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
- B41J13/00—Devices or arrangements of selective printing mechanisms, e.g. ink-jet printers or thermal printers, specially adapted for supporting or handling copy material in short lengths, e.g. sheets
- B41J13/02—Rollers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H9/00—Registering, e.g. orientating, articles; Devices therefor
- B65H9/10—Pusher and like movable registers; Pusher or gripper devices which move articles into registered position
- B65H9/103—Pusher and like movable registers; Pusher or gripper devices which move articles into registered position acting by friction or suction on the article for pushing or pulling it into registered position, e.g. against a stop
- B65H9/106—Pusher and like movable registers; Pusher or gripper devices which move articles into registered position acting by friction or suction on the article for pushing or pulling it into registered position, e.g. against a stop using rotary driven elements as part acting on the article
Definitions
- the present invention relates to a device for aligning sheets, and more particularly, to an aligning device for lining up sheets that are fed by turns to a printing apparatus such as an ink jet printer, which is capable of disposing an edge portion of a sheet at a proper location for a printing operation regardless of the properties of a sheet such as thickness and elasticity.
- Contemporary sheet feeding system as is well known in the art of printing apparatus such as a printer or a plain paper facsimile machine typically includes a paper tray, as shown in FIG. 1.
- a pick-up roller 11 is installed at substantially front portion of paper tray 10.
- a knock-up plate 30 mounted in a tray 10 is forced to push up a bunch of papers in the direction of the longitudinal axis of pick-up roller 11 by knock-up spring force thereby securing close adhesion of the top place sheet to pick-up roller 11.
- a guide 40 disposed to guide a sheet is installed adjacent the edge portion of front end of tray 10. Both rollers for delivering and securing papers, main roller 15 and friction roller 17, are provided at the middle path for delivering a sheet being guided by guider 40 in the forward direction.
- the top place sheet mounted in a tray 10 is fed to the sensing point adjacent a contact gap between friction roller 17 and main roller 15 by virtue of frictional force with the surface of pick-up roller 11 when the roller becomes to rotate. Thereafter main roller 15 is driven so as to deliver a sheet being fed from tray 10 to a proper location for printing. On this occasion, a sheet picked-up from tray 10 is to be delivered and advanced in the direction of level crossing with respect to a carriage (print head) movement.
- main roller 15 is provided at a location parallel with the path of a carriage movement plane .
- a friction roller 17 is disposed to almost contact with the top surface of main roller 15. Then a delivery time is measured during which a sheet can be delivered in good distance longer than the distance between pick-up roller 11 and main roller 15 when pick-up roller 11 initiates feeding operation so that main roller 15 can be rotated in the reverse direction with respect to sheet feeding direction during the given time interval.
- a sheet alignment device for use in a sheet feeding apparatus in which a driving gear is provided at an end portion of a pivot on which a pick-up roller is integrally formed.
- a knock-up spring coupler is used to link the driving gear and the pivot which spring coupler is disposed to reserve the turning effect of the above driving gear.
- FIG. 1 is a schematic elevational diagram of a sheet feeding apparatus conventionally adopted in the art of auto sheet feeding practice
- FIG. 2 is a schematic diagram of a sheet feeding mechanism used in conventional printing apparatus.
- FIG. 3 is a perspective view of a sheet alignment device for use in a sheet feeding apparatus according to the principles of the present invention.
- FIG. 3 a perspective view of sheet alignment device according to an embodiment of the present invention is illustrated in FIG. 3.
- the exemplar illustration in FIG. 3 includes at least two pick-up roller 11 spaced apart disposed on a pivot 13, for feeding sheets 50 to a proper location for printing in a printing apparatus .
- Driving gear 60 provided and installed at one portion of pivot 13 is disposed to be engaged with an end portion of a pivot 13 by spring coupler 70.
- Knock-up spring coupler 70 is disposed to be installed in such a manner that the knock-up spring being wound during rotational movement of driving gear 60.
- At least a pair of feeding rollers 11 are space apartedly provided at predetermined locations on the pivot 13.
- One end portion 14 of pivot 13 is substantially cylindrical shaped so as to mount a bracket thereon while another end portion 18 is of shaft shape so as to be inserted into driving gear 60.
- a guide portion 62 is integrally formed on a surface of driving gear 60.
- Both end arms of spring coupler 70 is disposed to be inserted respective first hole 35 provided at a predetermined location on pivot 13 and second hole 67 formed on guide portion 62, such that firm engagement is secured between driving gear 60 and pivot 13.
- the spring coupler 70 is employed to transmit power from a power source (not shown) to the pivot 13, and store and release rotational momentum to cause pivot 13 to continue to rotate after driving gear 60 stops rotating.
- driving gear 60 initiates to rotate by a turning effect transmitted from a power source (not shown), spring coupler 70 of which arm get caught in second hole 67 is forced to wind with respect to pivot 13.
- spring coupler 70 retains more torsion moment to its maximum tolerance. Upon occasion of retention of maximum torsion moment by continued rotation, spring coupler then forces pivot 13 to turn.
- feeding rollers 11 provided at predetermined position on pivot 13 become to turn and in turn to push away a sheet in contact with the lowest surface by using friction force.
- the sheet being forced is sufficiently pulled to move forward to reach a peripheral surface of main roller 15.
- torsion moment retained in spring coupler 70 still keeps pivot 13 to turn in same direction which in turn forces pick-up roller to maintain rotational movement.
- pick-up roller 11 is urged to re-rotate, feeding a sheet, aligning the front edge portion of the sheet in the vicinity of the contact point between friction roller and main roller, otherwise a failure may occurred due to a slip or backlash at the moment of driving gear stop.
- the driving gear 60 ceases rotational motion for an alignment of the sheet while the main roller 15 starts rotational movement in the reverse direction (i.e., clockwise in FIG. 2).
- the driving gear 60 ceases rotational movement for sheet alignment while the spring coupler 70 starts to unwind its coil so as to release the torsional moment retained thereon.
- This torsional moment forces the pivot 13 to keep rotating even after driving gear 60 has stopped.
- the pick-up roller is forced to maintain rotation allowing a sheet to move forward a predetermined distance, thereby securing tight contact between the end portion of a sheet and the gap (O). Therefore, a backlash phenomenon which occurs upon a stoppage of the driving gear 60 or a slippage phenomenon caused by the pick-up roller 11 no longer hinders sheet alignment.
- torsional moment as explained above can sufficiently offset any forces caused by backlash phenomenon and may still reinforce transfix force (F) at a substantially constant level thereby securing printing operational efficiency.
- Such a torsional torque as described above may be enough if the strength thereof applied to a sheet being fed gives at least a minimum transfix force (F) required for proper sheet feeding operation
- torsion coil spring is required to reserve a sufficient quantity of torsional moment in advance to an occurrence of a slip as explain above.
- a sheet being fed is secured to reach in the vicinity of main roller regardless of any properties of paper in a tray, preventing failure from sheet feeding operation thereby enhancing product efficiency.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Sheets, Magazines, And Separation Thereof (AREA)
Abstract
Description
Claims (4)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR2019950035418U KR200151931Y1 (en) | 1995-11-24 | 1995-11-24 | Sheet arranging apparatus for printing machine |
KR95-35418 | 1995-11-24 |
Publications (1)
Publication Number | Publication Date |
---|---|
US5846008A true US5846008A (en) | 1998-12-08 |
Family
ID=19430195
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US08/756,309 Expired - Lifetime US5846008A (en) | 1995-11-24 | 1996-11-25 | Sheet alignment device for use in a printing apparatus |
Country Status (2)
Country | Link |
---|---|
US (1) | US5846008A (en) |
KR (1) | KR200151931Y1 (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20050098939A1 (en) * | 2003-11-11 | 2005-05-12 | Benq Corporation | Guiding and positioning apparatus and method thereof |
US6951429B2 (en) * | 1998-08-18 | 2005-10-04 | International Business Machines Corporation | Feed assistance member and a medium processing apparatus |
CN1332816C (en) * | 2003-12-17 | 2007-08-22 | 明基电通股份有限公司 | Guide device, guide input method and guide method |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4509734A (en) * | 1981-07-30 | 1985-04-09 | Albert Rutishauser | Mechanically-operated magazine-unloading, sheet-feeding mechanism for sheet processing apparatus |
US4522385A (en) * | 1982-09-22 | 1985-06-11 | Bell & Howell Company | Sheet feeder systems |
US4529188A (en) * | 1983-07-05 | 1985-07-16 | Xerox Corporation | Sheet feeding and registration apparatus |
US4589646A (en) * | 1983-11-25 | 1986-05-20 | Silver Seiko Ltd. | Automatic paper feeding device for a printer |
US5116038A (en) * | 1989-11-25 | 1992-05-26 | Samsung Electronics Co., Ltd. | Paper feeding apparatus |
US5624109A (en) * | 1993-12-09 | 1997-04-29 | Murata Kikai Kabushinki Kaisha | Sheet feeding apparatus with rotary power transmission mechanism |
-
1995
- 1995-11-24 KR KR2019950035418U patent/KR200151931Y1/en not_active IP Right Cessation
-
1996
- 1996-11-25 US US08/756,309 patent/US5846008A/en not_active Expired - Lifetime
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4509734A (en) * | 1981-07-30 | 1985-04-09 | Albert Rutishauser | Mechanically-operated magazine-unloading, sheet-feeding mechanism for sheet processing apparatus |
US4522385A (en) * | 1982-09-22 | 1985-06-11 | Bell & Howell Company | Sheet feeder systems |
US4529188A (en) * | 1983-07-05 | 1985-07-16 | Xerox Corporation | Sheet feeding and registration apparatus |
US4589646A (en) * | 1983-11-25 | 1986-05-20 | Silver Seiko Ltd. | Automatic paper feeding device for a printer |
US5116038A (en) * | 1989-11-25 | 1992-05-26 | Samsung Electronics Co., Ltd. | Paper feeding apparatus |
US5624109A (en) * | 1993-12-09 | 1997-04-29 | Murata Kikai Kabushinki Kaisha | Sheet feeding apparatus with rotary power transmission mechanism |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6951429B2 (en) * | 1998-08-18 | 2005-10-04 | International Business Machines Corporation | Feed assistance member and a medium processing apparatus |
US20050098939A1 (en) * | 2003-11-11 | 2005-05-12 | Benq Corporation | Guiding and positioning apparatus and method thereof |
US7152858B2 (en) * | 2003-11-11 | 2006-12-26 | Benq Corporation | Guiding and positioning apparatus and method thereof |
CN1332816C (en) * | 2003-12-17 | 2007-08-22 | 明基电通股份有限公司 | Guide device, guide input method and guide method |
Also Published As
Publication number | Publication date |
---|---|
KR200151931Y1 (en) | 1999-07-15 |
KR970023461U (en) | 1997-06-18 |
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Legal Events
Date | Code | Title | Description |
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AS | Assignment |
Owner name: SAMSUNG ELECTRONICS CO., LTD., KOREA, REPUBLIC OF Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:PARK, JIN-HO;REEL/FRAME:008618/0354 Effective date: 19970123 |
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STCF | Information on status: patent grant |
Free format text: PATENTED CASE |
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FEPP | Fee payment procedure |
Free format text: PAYOR NUMBER ASSIGNED (ORIGINAL EVENT CODE: ASPN); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY |
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FPAY | Fee payment |
Year of fee payment: 4 |
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AS | Assignment |
Owner name: SAMSUNG ELECTRONICS CO., LTD., KOREA, REPUBLIC OF Free format text: CONFIRMATORY ASSIGNMENT;ASSIGNOR:SAMSUNG ELECTRONICS CO., LTD.;REEL/FRAME:012928/0715 Effective date: 20020523 Owner name: LEXMARK INTERNATIONAL, INC., KENTUCKY Free format text: CONFIRMATORY ASSIGNMENT;ASSIGNOR:SAMSUNG ELECTRONICS CO., LTD.;REEL/FRAME:012928/0715 Effective date: 20020523 |
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FPAY | Fee payment |
Year of fee payment: 8 |
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FPAY | Fee payment |
Year of fee payment: 12 |